基于CAE仿真技術的白車身動剛度分析優化

吳亞萍　秦麗萍　曾樂彬

摘 要：人們對汽車車內噪音舒適性評價越顯關注。車輛的NVH性能正在成為汽車開發過程中的最重要指標，白車身動剛度作為NVH性能關鍵指標之一，具有重要意義。本文以某車型為研究對象，闡述了白車身動剛度基本分析過程，并選取后懸減震器接附點動剛度為優化對象，通過CAE仿真技術，識別后懸減震器接附點動剛度不足的主要原因并進行優化，實現了該車身NVH性能提高。

關鍵詞：NVH 動剛度 模態分析 ODS診斷

Dynamic Stiffness Analysis and Optimization of BIW Based on CAE Simulation Technology

Wu Yaping Qin Liping Zeng Lebin

Abstract：People pay more attention to the evaluation of the interior noise comfort. Vehicle NVH performance is becoming the most important index in the process of vehicle development. As one of the key indexes of NVH performance analysis， the dynamic stiffness of body in white is of great significance. Taking a vehicle as the research object， this paper describes the basic analysis process of the dynamic stiffness of the body in white， and selects the dynamic stiffness of the connection point of the rear suspension shock absorber as the optimization object. Through the CAE simulation technology， the main reasons for the insufficient dynamic stiffness of the connection point of the rear suspension shock absorber are identified and optimized， and the NVH performance of the body is improved.

Key words：NVH， dynamic stiffness， the modal analysis， ODS diagnosis